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//
// Wildland Project
//
// Copyright © 2022 Golem Foundation
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License version 3 as published by
// the Free Software Foundation.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with this program.  If not, see <https://www.gnu.org/licenses/>.

use std::rc::Rc;

use serde::Serialize;
use wildland_crypto::identity::signing_keypair::SigningKeypair;

use super::constants::WILDLAND_SIGNATURE_HEADER;
use super::models::{
    CreateCredentialsReq,
    CreateCredentialsRes,
    CreateStorageRes,
    RequestMetricsReq,
    RequestMetricsRes,
    SignatureRequestReq,
    SignatureRequestRes,
};
use crate::cross_platform_http_client::{Body, CurrentPlatformClient, HttpClient};
use crate::error::WildlandHttpClientError;
use crate::response_handler::check_status_code;

#[derive(Debug)]
pub struct Credentials {
    pub id: String,
    pub secret: String,
}

#[derive(Clone)]
pub struct StorageControllerClient {
    // TODO:WILX-210 credentials are provided here only for test purposes. Remove it and get real id and secret assigned to a lease
    pub credential_id: String,
    pub credential_secret: String,
    http_client: Rc<dyn HttpClient>,
    base_url: String,
}

impl StorageControllerClient {
    #[tracing::instrument(level = "debug", skip_all)]
    pub fn new(base_url: String) -> Self {
        let http_client = Rc::new(CurrentPlatformClient {});

        Self {
            credential_id: String::default(),
            credential_secret: String::default(),
            http_client,
            base_url,
        }
    }

    #[tracing::instrument(level = "debug", skip_all)]
    pub fn create_storage(&self) -> Result<CreateStorageRes, WildlandHttpClientError> {
        let request =
            http::Request::post(format!("{}/storage/create", self.base_url)).body(Body::empty())?;

        let response = self.http_client.send(request)?;
        check_status_code(response)?
            .map(|body| serde_json::from_slice(&body))
            .into_body()
            .map_err(Into::into)
    }

    #[tracing::instrument(level = "debug", skip_all)]
    pub fn create_credentials(
        &self,
        request: CreateCredentialsReq,
    ) -> Result<CreateCredentialsRes, WildlandHttpClientError> {
        let signature = self.sign_request(&request)?;
        let request = http::Request::post(format!("{}/credential/create", self.base_url))
            .header(WILDLAND_SIGNATURE_HEADER, signature)
            .body(Body::json(request))?;

        let response = self.http_client.send(request)?;
        check_status_code(response)?
            .map(|body| serde_json::from_slice(&body))
            .into_body()
            .map_err(Into::into)
    }

    #[tracing::instrument(level = "debug", skip_all)]
    pub fn request_signature(
        &self,
        request: SignatureRequestReq,
    ) -> Result<SignatureRequestRes, WildlandHttpClientError> {
        let signature = self.sign_request(&request)?;
        let request = http::Request::post(format!("{}/signature/request", self.base_url))
            .header(WILDLAND_SIGNATURE_HEADER, signature)
            .body(Body::json(request))?;

        let response = self.http_client.send(request)?;
        check_status_code(response)?
            .map(|body| serde_json::from_slice(&body))
            .into_body()
            .map_err(Into::into)
    }

    #[tracing::instrument(level = "debug", skip_all)]
    pub fn request_metrics(
        &self,
        request: RequestMetricsReq,
    ) -> Result<RequestMetricsRes, WildlandHttpClientError> {
        let signature = self.sign_request(&request)?;
        let request = http::Request::post(format!("{}/metrics", self.base_url))
            .header(WILDLAND_SIGNATURE_HEADER, signature)
            .body(Body::json(request))?;

        let response = self.http_client.send(request)?;
        check_status_code(response)?
            .map(|body| serde_json::from_slice(&body))
            .into_body()
            .map_err(Into::into)
    }

    #[tracing::instrument(level = "debug", skip_all)]
    pub fn get_credential_id(&self) -> &str {
        &self.credential_id
    }

    #[tracing::instrument(level = "debug", skip_all)]
    pub fn get_credential_secret(&self) -> &str {
        &self.credential_secret
    }

    #[tracing::instrument(level = "debug", skip_all)]
    fn sign_request<T>(&self, request: &T) -> Result<String, WildlandHttpClientError>
    where
        T: Serialize,
    {
        let message = serde_json::to_vec(request)?;
        let keypair =
            SigningKeypair::try_from_str(self.get_credential_id(), self.get_credential_secret())?;
        let signature = keypair.sign(&message);
        Ok(signature.encode_signature())
    }
}